WHAT IS DIFFERENCE BETWEEN WHAT ARE YOU DOING?? AND HOW ARE YOU DOING????

क्या कर रहे हो? कैसा चल रहा है? sence of both the sentences are same but way of asking is different.

What are you doing: to ask for his current action How are you doing: to ask about him, the reply is often good or fine..

Thanks Pammi

What are you doing? means तुम क्या कर रहे हो? How are you doing? means तुम कैसे हो?

Thanks all guys very much for helping mee

Thanks miss Greta